Power supply



FIG. 1 is a perspective view of a power supply showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is an enlarged left elevation view thereof;

FIG. 6 is an enlarged right elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of the selected portion 9 in FIG. 1;

FIG. 10 is an enlarged view of the selected portion 10 in FIG. 1; and,

FIG. 11 is an enlarged view of the selected portion 11 in FIG. 3.

The broken lines shown in the figures depict portions of the power supply that form no part of the claimed design. 

CLAIM The ornamental design for a power supply, as shown and described. 